package com.kuang.config;


import com.kuang.pojo.User;
import com.kuang.service.UserService;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.subject.Subject;
import org.springframework.beans.factory.annotation.Autowired;


// 自定义的Realm
public class UserRealm extends AuthorizingRealm {

    //
    @Autowired
    private UserService userService;

    // 授权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        System.out.println("执行了--授权doGetAuthorizationInfo");

        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
//        info.addStringPermission("user:add");

        // 拿到当前登录的对象
        Subject subject = SecurityUtils.getSubject();
        User currentUser = (User) subject.getPrincipal();

        // 设置当前用户的权限
        info.addStringPermission(currentUser.getPerms());

        return info;
    }

    // 认证
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        System.out.println("执行了--认证doGetAuthorizationInfo");

        // 用户名 密码   数据库中去
//        String name = "root";
//        String password = "123456";

        // 连接真实数据库
        UsernamePasswordToken userToken = (UsernamePasswordToken)token;
        User user = userService.queryUserByName(userToken.getUsername());
        if(user == null){
            // 没有这个人
            return null;
        }

        Subject currentUser = SecurityUtils.getSubject();
        Session session = currentUser.getSession();
        session.setAttribute("loginUser",user);

        // 密码认证 shiro做
        return new SimpleAuthenticationInfo(user,user.getPwd(),"");
    }
}
